My first run of boards came in this week. I am pleased to report that the circuit works as intended (sings an analog electronic song). I’ll post video of that soon, but for now, some photos of the pretty board. I used gold-plated copper and solder mask to achieve a watermark effect, as you can see in some of these pictures. These boards (along with components to solder) will be given to attendees at Creative Capital’s 2019 retreat in June.

2019 circuit board designed in KiCad (colors correspond to KiCad layers - not my choosing, but interesting op art effect). The circuit sings a simple “pretty bird” song as demonstrated in the following video…

Detail from recent experiments in 3d. Collective intelligence, AI, and Elon Musk have been on my mind lately. This image was made possible by a wealth of information and tools that are free for anyone with an Internet connection, notably Blender, Andrew Price aka “Blender Guru” videos on YouTube, and models available under the Creative Commons license (butterfly by Kirin Karpenko and LEDs by Sonny See, both available on Blendswap). Although not free, Julius Harling’s incredible Graswald also deserves mention. #creativecommonslicense

This simple circuit sings like a bird, even with chirp variation! This effect is caused by various discrete non-linear components in a breadboard. I tried to build a soldered version and, while it sings, I haven’t been able to reproduce the life-like quality of this circuit (hence my theory that parasitic capacitance is at play).

In the front half of the breadboard, you see three astable multivibrators that create an irregular tempo. These are connected back to various locations in a “chirp generator” circuit (based on the classic doorbell canary design with an audio transformer).